Question

Today the world's number one problem is

Answer 1

Answer:

The First major problem of Our world is Pollution(a) Of our world As it connects all major issues today such as greenhouse effect(b)(CH4(c), CO(d)), melting of snow and breakover of many residents.

The things reffered above are:-

Explanation:

Pollution:- The situation of a smoke or other carbonic pollutants caused by the combustion or chemical processes as a result to the chemical reactions with a particular substance is called pollution.

Greenhouse effect:-The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere.

CH4:- Methane is a greenhouse gas.

CO:- Carbon Monoxide is a poisonous and harmful gas.